.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #001529;
  padding: 0 24px;
  height: 64px;
  line-height: 64px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
}

.leftSection {
  display: flex;
  align-items: center;
}

.logoSection {
  display: flex;
  align-items: center;
  gap: 12px;
}

.titleSection {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.systemName {
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(90deg, #1890ff 0%, #69c0ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.rightSection {
  display: flex;
  align-items: center;
  gap: 24px;
}

.userDropdown {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.3s;
}

.userDropdown:hover {
  background: rgba(255, 255, 255, 0.1);
}

.username {
  color: rgba(255, 255, 255, 0.85);
  margin-left: 8px;
}